Rotation Program Rotation POWDERY MILDEW POWDERY Nursery Rotation Recommended Application Target Application FRAC # Fungicide Application Timing Treatment Rates Diseases Apply as full coverage spray to the point Powdery mildew, 1 Spray M5 + 3 Concert® II* 22 - 35 fl. oz./100 gal. of drip on a 14-day Leaf spots, Rusts interval Foliar application on a Powdery mildew, 2 Spray 9 + 12 Palladium 4 - 6 oz./100 gal. 14-day interval Leaf spots Foliar application on a Powdery mildew, 3 Spray 11 + 7 Mural 4 - 7 oz./100 gal. 14-day interval Leaf spots, Rusts Foliar application on a 4 Spray 3 Eagle 20 EW 6 - 12 fl. oz./100 gal. Powdery mildew, Rusts 14-day interval REPEAT *Concert II is not for use in greenhouses. Use Daconil Weatherstik in place of Concert II for greenhouse applications. Your Complete Powdery Mildew Solution A preventive fungicide rotation is essential for successfully controlling powdery mildew. Following this recommended program and incorporating appropriate cultural practices can help reduce the threat of powdery mildew in greenhouses and nurseries. To learn more, visit www.GreenCastOnline.com/Solutions Photos are either the property of Syngenta or used under agreement. © 2016 Syngenta. Important: Always read and follow label instructions. Some products may not be registered for sale or use in all states or counties and/or may have state-specific use restrictions. Please check with your local extension service to ensure registration and proper use. Concert®, Daconil Weatherstik®, Mural®, Palladium®, the Alliance Frame, the Purpose Icon and the Syngenta logo are trademarks of a Syngenta Group Company. All other trademarks are property of their respective owners. GS 426.30023 (11/16) SCP 928-00014-A Powdery mildew can affect a wide range of herbaceous and woody ornamental crops. Knowing which crops are susceptible, coupled with good scouting and a preventive rotation of effective fungicides, can allow you to avoid the unsightly effects of powdery mildew on your plants. The following recommendations help reduce the risk of disease in your operation. Powdery mildew fungi form white, talcum-like spots called Environmental Conditions Conducive “colonies” on leaves, stems and flowers. Over time, these colonies to Powdery Mildew increase in size and number to cover the plant’s surface. If not controlled, severe infections will cause leaves to turn yellow, brown Powdery mildews are most likely to develop in the spring and then drop, resulting in reduced plant vigor and growth. While or fall when: powdery mildew is often first observed on the upper surface of the • Temperatures are between 62° - 72°F leaves, both sides may develop colonies, so it is important to check • Relative humidity levels are 70 percent or greater both sides of the leaf when scouting. • There is reduced light intensity Moisture on plants from dew or irrigation does not favor the Symptoms development of powdery mildew and can even limit the disease • White powdery spots or coating on both sides of leaves, stems development by inhibiting germination and killing the spores. and young buds • Flower petals and bracts of poinsettia can also be affected Cultural Tips • Yellow or brown leaves • Provide a clean, dry • Keep humidity low • Distorted leaves and flower buds or undeveloped flowers growing environment by heating and venting • Stunted growth • Check incoming plants as needed for disease • Remove diseased plants Powdery mildew can be more serious on woody ornamentals like • Scout fully expanded immediately to limit spore roses and crape myrtles because it attacks new growth including leaves weekly, particularly in production and spread buds, shoots, flowers and leaves. the lower to mid-canopy • Overhead irrigation may where air movement may reduce the spread of powdery be limited mildew as it washes the spores off plants Susceptible Crops Several different fungi cause powdery mildew and each prefer different plants. The fungi listed below favor the corresponding plant types. Erysiphe cichoracearum is a common powdery mildew fungus Fungi Susceptible Crop that can infect many plants, including: Erysiphe australiana Crape Myrtle Erysiphe polygoni Hydrangea • Ageratum • Delphinium • Rudbeckia Microsphaera penicillata Lilac • Aster • Gaillardia • Salvia Oidium sp. Snapdragon, Poinsettia • Calendula • Gerbera • Scabiosa Oidium begoniae Begonia (fibrous and tuberous) Oidium longipes/Erysiphe sp. Petunia • Coreopsis • Gloxinia • Verbena Sphaerotheca pannosa var. rosae Rose • Dahlia • Phlox • Zinnia Sphaerotheca macularis Pansy Powdery Mildew Prevention Programs Prior to disease development, apply fungicides in a rotation on a 14-day interval. For active infections, shorten the application interval to 7 days. Greenhouse Rotation Recommended Application Target Application FRAC # Fungicide Application Timing Treatment Rates Diseases Apply as full coverage spray Daconil to the point of drip on a Powdery mildew, 1 Spray M5 22 fl. oz./100 gal. Weatherstik® 14-day interval prior Leaf spots, Rusts to blooms Foliar application on a Powdery mildew, 2 Spray 9 + 12 Palladium® 4 - 6 oz./100 gal. 7 - 14-day interval Leaf spots Foliar application on a Powdery mildew, 3 Spray 11 + 7 Mural® 4 - 7 oz./100 gal. 14-day interval Leaf spots, Rusts Foliar application on a 4 Spray 3 Eagle® 20 EW 6 - 12 fl. oz./100 gal. Powdery mildew, Rusts 14-day interval REPEAT Powdery mildew can affect a wide range of herbaceous and woody ornamental crops. Knowing which crops are susceptible, coupled with good scouting and a preventive rotation of effective fungicides, can allow you to avoid the unsightly effects of powdery mildew on your plants. The following recommendations help reduce the risk of disease in your operation. Powdery mildew fungi form white, talcum-like spots called Environmental Conditions Conducive “colonies” on leaves, stems and flowers. Over time, these colonies to Powdery Mildew increase in size and number to cover the plant’s surface. If not controlled, severe infections will cause leaves to turn yellow, brown Powdery mildews are most likely to develop in the spring and then drop, resulting in reduced plant vigor and growth. While or fall when: powdery mildew is often first observed on the upper surface of the • Temperatures are between 62° - 72°F leaves, both sides may develop colonies, so it is important to check • Relative humidity levels are 70 percent or greater both sides of the leaf when scouting. • There is reduced light intensity Moisture on plants from dew or irrigation does not favor the Symptoms development of powdery mildew and can even limit the disease • White powdery spots or coating on both sides of leaves, stems development by inhibiting germination and killing the spores. and young buds • Flower petals and bracts of poinsettia can also be affected Cultural Tips • Yellow or brown leaves • Provide a clean, dry • Keep humidity low • Distorted leaves and flower buds or undeveloped flowers growing environment by heating and venting • Stunted growth • Check incoming plants as needed for disease • Remove diseased plants Powdery mildew can be more serious on woody ornamentals like • Scout fully expanded immediately to limit spore roses and crape myrtles because it attacks new growth including leaves weekly, particularly in production and spread buds, shoots, flowers and leaves. the lower to mid-canopy • Overhead irrigation may where air movement may reduce the spread of powdery be limited mildew as it washes the spores off plants Susceptible Crops Several different fungi cause powdery mildew and each prefer different plants. The fungi listed below favor the corresponding plant types. Erysiphe cichoracearum is a common powdery mildew fungus Fungi Susceptible Crop that can infect many plants, including: Erysiphe australiana Crape Myrtle Erysiphe polygoni Hydrangea • Ageratum • Delphinium • Rudbeckia Microsphaera penicillata Lilac • Aster • Gaillardia • Salvia Oidium sp. Snapdragon, Poinsettia • Calendula • Gerbera • Scabiosa Oidium begoniae Begonia (fibrous and tuberous) Oidium longipes/Erysiphe sp. Petunia • Coreopsis • Gloxinia • Verbena Sphaerotheca pannosa var. rosae Rose • Dahlia • Phlox • Zinnia Sphaerotheca macularis Pansy Powdery Mildew Prevention Programs Prior to disease development, apply fungicides in a rotation on a 14-day interval. For active infections, shorten the application interval to 7 days. Greenhouse Rotation Recommended Application Target Application FRAC # Fungicide Application Timing Treatment Rates Diseases Apply as full coverage spray Daconil to the point of drip on a Powdery mildew, 1 Spray M5 22 fl. oz./100 gal. Weatherstik® 14-day interval prior Leaf spots, Rusts to blooms Foliar application on a Powdery mildew, 2 Spray 9 + 12 Palladium® 4 - 6 oz./100 gal. 7 - 14-day interval Leaf spots Foliar application on a Powdery mildew, 3 Spray 11 + 7 Mural® 4 - 7 oz./100 gal. 14-day interval Leaf spots, Rusts Foliar application on a 4 Spray 3 Eagle® 20 EW 6 - 12 fl. oz./100 gal. Powdery mildew, Rusts 14-day interval REPEAT Rotation Program Rotation POWDERY MILDEW POWDERY Nursery Rotation Recommended Application Target Application FRAC # Fungicide Application Timing Treatment Rates Diseases Apply as full coverage spray to the point Powdery mildew, 1 Spray M5 + 3 Concert® II* 22 - 35 fl. oz./100 gal. of drip on a 14-day Leaf spots, Rusts interval Foliar application on a Powdery mildew, 2 Spray 9 + 12 Palladium 4 - 6 oz./100 gal. 14-day interval Leaf spots Foliar application on a Powdery mildew, 3 Spray 11 + 7 Mural 4 - 7 oz./100 gal. 14-day interval